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cm:Level1TextBlock: us-gaap:AssetRetirementObligationDisclosureTextBlock
Standard label: Asset Retirement Obligation Disclosure [Text Block]
Name: us-gaap:AssetRetirementObligationDisclosureTextBlock
Documentation: The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.
Object type: cm:Level1TextBlock
Data type: Text Block (HTML) (nonnum:textBlockItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:AssetRetirementObligationDisclosureTextBlock
Examples of this text block disclosure: AssetRetirementObligationDisclosure

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Labels
Label Role Language
Asset Retirement Obligation Disclosure [Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 410 20 http://fasb.org/us-gaap/role/ref/legacyRef 410